No, these things were taught to me in school and I’ve never heard anyone consider historical facts like this to be CRT except people railing against conservatives (ironically demonstrating their own ignorance of what CRT is).
What’s problematic about CRT is its postmodern view that liberalism is inadequate (or worse) at eliminating racism; downplaying objectivity in favor of “lived experience” that can supposedly never be truly understood by white people; rejecting colorblindness out of hand; advocating segregation of minorities in the name of “safe spaces”; regularly and unscientifically trumpeting the existence and scope of unconscious bias; emphasizing intersectionality to the point of essentialism.
The famous Smithsonian “Assumptions of Whiteness” infographic (https://www.newsweek.com/smithsonian-race-guidelines-rationa...) is an example of these concepts infesting a mainstream cultural educational entity. There’s room to critique current racial discourse and advocate for changing models, but to state that the scientific method and “objective, rational linear thinking” are white values, implying that whites have a monopoly on science or that minorities are less capable at it, is obviously derived from critical theory, and is (I think unquestionably) horrifically racist. When there is any sign of these viewpoints seeping from higher academia into elementary schools, it’s perfectly natural for parents to become concerned.